Of course, that's the release date for the Russian version of the game. So far there's been no word at all on a US release date or even a US distributor for the sequel.German-based bitComposer Games announced a little while ago that they had secured the worldwide publishing rights to the title. We do know that the game will be one of the first to support DirectX11-based graphics.
Gallery: S.T.A.L.K.E.R.: Call of Pripyat